If a toddler is tantruming because they want something they can't have the one important principle is that their behaviour doesn't change your decision.
If you allow your behaviour to be affected by their tantrum they will learnt to use tantrums to get what they want and your life will be a nightmare.
If you stand firm the tantrums will not develop beyond protests and expressions of emotion. They will grow out of them which is good for all concerned.
You clearly get this bit and aren't giving in to your son's demands which is perfect.
The next challenge is how to respond to the tantrum in other ways and your deep knowledge of him as his parent will guide you.
Giving him a cuddle when he's upset or angry isn't pandering to him or encouraging the tantrums because you aren't giving him the thing he's tantruming about, on this occasion the TV.
Even when he knows for sure that he won't get he wants by kicking off he still has to learn to manage his emotions. You can help him to develop those skills be offering physical comfort when you feel his is ready to calm down but needs a bit of help. That's when it's appropriate to cuddle him if he wants it.
If you think a cuddle will help him to feel calmer and end the tantrum you are doing the right thing by giving him one. If, however, the cuddle would just giving him something to rail against, a calm presence without physical contact would probably be better.
You're reflecting carefully on your parenting and it sounds like you're getting the balance right. What you need to do is think through why you're making the decisions you are making and what you feel they will help you to achieve and then you'll be in a better position to explain your actions to others not that you should feel oblige to explain your parenting decisions to anyone ever.