recently and some other online blogs which said that kyc verification is extremely dangerous. If this is true, why do most crypto apps or other business ask for it, shouldn't it be banned or removed.
Because platforms are forced to require AML/KYC simply because the government requires them; or else they'll get shut down.
Kyc verification for long has helped prevent identity theft, financial laundering or fraud, terrorism and all financial crimes.
Sure — but historically it caused far more bad than good. People often heavily underestimate how bad of a damage database leaks can cause.
Is this true that kyc verification can put your funds and personal data at risk?
Yes, I assume you've already read the post you linked.
Should we stop using any app that ask for kyc verification?
It'll be very very difficult to live your day to day life without using platforms that require KYC verification. The only thing I'll suggest is that you do not submit KYC verification unless totally necessary(e.g. banks, insurance, etc). A lot of people register and submit KYC on a crap ton of crypto exchanges, which is a very dumb idea.