Those risks are covered.

https://www.gov.uk/government/consultations/plug-in-solar

> Incorporate partially insulated pins to prevent access to live conductive parts

> Incorporate non-rewireable moulded plug fitted with a BS 1362 fuse not exceeding 5A

And anti-islanding, so it disables when the grid isn't live.

Seems quite reasonable. Also, like, this is a thing balcony solar is being done in lots of regions of the world now. Based on those parts of the world not burning down, not electrocuting people at scale, this is ipso facto all just a sad tired lot of ridiculous FUD.