DIY, I don't believe what you say to be true at all, and is a bit misleading.
Some of it is down to individual hospital policies. Some of it is standard procedure everywhere.
They will take a blood sample before any operation to establish your blood type and usually will test your blood for iron. But they may well do this for some women having a VB anyway, if they have had low iron during their pregnancy or there is some other reason to suggest that they may be at high risk of needing a blood transfusion or other complications.
Following my ELCS they took my blood during the operation (not by a needle) and my iron was ok, so I didn't have any further blood tests. If it had been low I'm sure they would have, but it didn't appear that it was necessary so they didn't. But as I say, that isn't something that's necessarily exclusive to having a CS.
I had a drip from the CS, so they were able to administer anti-biotics and pain relief intravenously without additional injections. I could have had morphine if I wanted - this would have been via IV so no need for another injection. (I didn't).
I did have anti-clotting injections as I am over 35, but at my hospital this was only standard for my age group or for women who had a medical history that suggested you needed this. It was the exception rather than the rule. This was once a day.
So blood test before the ELCS, spinal, drip and then a daily injection due to my age. That's 3 plus the daily anti-clotting for ten days. I personally don't think that's hugely excessive, especially if you are younger. It really is down to individual circumstances that dictate your individual need combined with hospital policy.
I was in hospital for 2 nights. Which is the hospital's standard for an ELCS without complications.
The thing I had found hardest in hospital post op was not the medical side of things, nor the pain or lack of mobility, but being constantly disturbed for various reasons even in a private room. The sleep deprivation was not exclusively down to DS. Being home in pain and struggling to move around was easier than being in hospital because of the relative peace and quiet - but that did rely on DH heavily looking after me.
Again, I do think that many of these things could have been issues regardless of the type of birth I'd had. You could attempt a VB and end up having more injections depending on how it panned out. Having a VB I may have been in hospital for a shorter time. But again you can be in labour for 3 days and then stay in for another 2 so there are swings and roundabouts there too. Regardless of what you do, you can only plan to a certain degree and you won't rule out all eventualities.
I remember, having got my head prepared for an ELCS, being terrified for the last week of the baby turning up before my planned date. I also had a big wobble a few weeks earlier too and had dashed to the hospital to get checked over because I was scared of reduced movements. So you need to have some sort of coping strategy in place for those sort of situations.
Ultimately, the issue for you is how you will cope with the unexpected, how likely that unexpected is and what the most likely unexpecteds are. Everyone is different and everyone has different things that they struggle to cope with, so that's what you need to assess more than anything.
As for anything being sprung, I was very well informed prior to having the ELCS. This was part of my treatment for the anxiety, and the hospital did everything they could to try and do this as they understood that this would help me with coping, because I could visualise things before the day. Visualising things won't be the right thing for everyone, but it was good for me. I was able to visit the waiting room, delivery ward, the theatre and the post-natal ward prior to the day. It meant that I wasn't just turning up with no idea of where I was going, what it would look like and who might be looking after me. They don't normally do this at the hospital I was at, but they were committed to individualised care plans and saw this as part of my care due to my anxiety. Like I say there were fantastic in recognising I had particular issues and tailored what they did to suit me, rather than just throwing me in and expecting me to deal with what was thrown at me. If they don't offer things like this, it may be worth asking if you think it might help.