I've WFH for over a decade. Started when I was living in a flatshare in my 20s. Did it from multiple flatshares, often just in my bedroom. Built up a successful self-employed career in a brand new industry in that time.
That's why I don't have any time for the arguments that it's bad for productivity, networking or creativity.
I networked online. Social media, emails, messaging. Yes, I organised IRL meetings/drinks/coffees as well but it was amazing how much more effective a back-and-forth quipping over email was in terms of getting to know someone and building long-term contacts. This was also a lot less stressful to me than IRL networking events, which usually consisted of me shuffling into a packed room, realising I knew no one, standing to the side and clutching my drink for 20 minutes then just running away.
It had zero effect on me having a formidable social life. Work and socialising are completely separate in my mind, they are two completely different modes of being to me. At work I am in work mode - head down, total focus on the job. I'm only in socialising mode - in my 20s, that was full-on party animal - when I'm not thinking about work at all. And the idea that your social circle is the same as your colleagues is unfathomable to me.
Working from a bedroom in a flatshare may not have been optimal but it was 100 times better than enduring a soul-sucking, crammed commute twice a day and spending the hours in between in an office where I couldn't control the temperature, the brightness, the volume, the people around me... I found that physically intolerable for the few years I did it.
Never found it hard to separate work and home life. It's actually so much easier to organise both around each other. Sometimes I have to wait on a response before I can get on with my work and I don't have to twiddle my thumbs in an office - I can go for a run, do the laundry, read a book instead, then get on with the work in my own time. I also do better work because I do it when I'm in the best headspace to be creative - which might be at 6am when I've just woken up, 2am late at night, whenever. I don't have to wait to be in an office when inspiration strikes. I also work across multiple time zones so being tied to an office would be fairly awful in that regard.
WFH is not bad for work or even most workers. It's bad for a select group of workers, and they seem unable to comprehend how bad office life was for others.
And there are easy solutions to all of their complaints. There's nothing stopping you going to a cafe to work if you crave other people around you. Or from working with a colleague or two if you feel like it - there are plenty of spaces you can use to do this. As a freelancer I'd sometimes just pop round to another freelancer's friend's house to do a morning's work. WFH does not mean you are literally forced to only work by yourself in your house.
I've also successfully worked with multiple international teams and for many international clients whom I've never met face-to-face. Making it work was really not a big deal at all. It's ridiculous to frame WFH as innately harmful to work.