The thing the NHS is instructing is good advice generally. It's because they've got to assume most people are dumb and they'll mess it up. If you go to A&E they'd drain it, but they know they're doing it right. They've got to assume you'll mess it up, and so advise to leave it as is, as the fluid protects it, incubates it while new skin forms, but the pressure can be painful and if it's drained it'll become a scab, which does the same job. Reality is that you've got work at some point and you can't put a shoe on that. You can with a scab.
You're obviously not daft, but it's up to you what you do. We're no medics.