In a previous life when i wad in a different professiom, I worked at a hotel chain. In-house Estates team did all the maintenance. Untrained guys would change sockets and do other odd jobs. 90% of the time they were 'experienced' enough for basic maintenance - but 10% of the time they weren't - and certaintly didnt know of what to do if they encountered an issue. I remember one of the maintenance guys telling me he regularly fouid sockets woth 4 or 5 cables coming out and if replacing the front he would just replicate it and push it back. Similarily there wasn't record keeping. I imagine this is the same story in many hotels, community centres, schools etc.
Im not assuming this is the cause but it's certainly a trend i've noticed. I've always found it bizzare that domestic work is somewhat regulated but it isn't really in other sectors
Not that regulation really fixes anything - and just ends up costing trades more
Still find it a bit of a giggle that I make changes to 415v boards at work, where the public can access fixtures and fittings - but can't fit a 240v DB at home where I live on my own because i'm not in a scheme / scam.