Technically excellent websites are only of interest to other Web devs and designers. Nobody else cares.
Nobody else cares until they get hacked, or they have to redo the website to customise it, or they realise how much modifications costs, or they realise that they are losing customers because its slow loading, or any of countless problems poor quality causes.
I can think of customers who have paid several times the cost of wiring good code in the extra work required to maintain and extend bad code.
What do you suggest my mum uses for her craft group. Or the youth footie team use for events and payments? Or the butchers uses to take orders.
Impossible to say without know the people involved.
If ease of use is the overwhelming consideration, a site builder. Yes, they are rubbish in terms of technical excellence in the front end, but they are by far the easiest option.
Otherwise any CMS you can find hosting with a one click install for. Wordpress is the most common but a minute on Google will find plenty more options (Ghost, Microweber, Joomla etc.). Not used any of these but plenty of people seem to like them.
Very often, a service focused on your type of business or organisation. For example the sailing club my daughter belongs to has a site provided by a sailing club site provider. It has all the functionality they need, out of the box. Some of it is very specific to sailing clubs. As you know, I am not a huge fan of SaaS, but sometimes it makes sense.
If you want future flexibility (e.g. you know you are likely to need custom development). Then its worth the extra cost of getting someone to setup some thing else (my choice would probably be Wagtail, but there are a lot of others) and a simple install of almost anything will not be expensive. Not likely for your mum's craft group, but for a lot of businesses it makes sense to be able to automate and integrate things easily, add custom functionality, etc.
