I find it to be a lot of social media induced nonsense.
NHS employees are not heroes, just normal people going about their job which unfortunately has, through no fault of their own, become somewhat dangerous of late. They've been saving lives for decades and the general public hasn't given that much thought before.
The same happy clappy types will no doubt be at A&E in a few months time, or whenever this is mostly forgotten, demanding immediate attention for the paper cut on their finger and threatening legal action if they're not seen right away.
I say this as a supposed key worker at a care home. Nothing at all heroic about my job, and I wouldn't be comfortable clapping myself.