Threads like this are so dumb, it hurts.
OP, if you have followed all the rules (most of us have) why don't you make this choice discretely? You're not supposed to send your ds to his mate's house because, you see, we all want to do just that. All of us want to send our one, two, three, four etc. kids to their mates' house. Well, if we all did then the risk of covid spreading is significantly increased, oops.
Sure, many people are vaccinated now but most have had just one vaccine, some have had none and most importantly children haven't been vaccinated and still catch it and spread it.
The question you should ask yourself is: Do you want to be responsible for fostering infection chains so that your dc's friends and their families potentially get Covid or plain old cold symptoms, go through the process of worrying and having to SI, lose income if they can't go to work and miss out on school (again!!) ....... just cos you and your son can't wait 2 weeks? Why is it more important for your son to visit their friend than for the million plus other children who also all crave playdates? But if we all sent our kids over infections would rise when the vaccine rollout isn't where it will be in 2 weeks. It's numbers game.
Sure, the above scenario is still possible and likely in two weeks but that is epidemiology isn't it? It's about minimising risk on a population level and waiting 2 weeks with all this is part of the bigger picture of managing covid on a population level and a higher % of people will either have received their first vaccine in two weeks or even complete their vaccination, so it does make a difference.
At the end of the day, why not let your kid go discretely, if they must, why do you need to make a public point, which sadly undermines all the public health efforts and makes mumsnetters think, 'ah well if they do it, why should we stick to the rules'..... It's bizarre.