And what if he has a low-quality device? The cam quality and internet signal could prevent his documents to be uploaded successfully. We can also wait for days for some instances only for our KYC to get verified. A fraudster will never do a KYC because they will only be caught out easily if they do. Binance might be secured but it still attracts scammers. I also don't find it convenient because of the KYC but maybe it is, once we already passed it?
KYC in binance is actually quite easy and fast, if you have scanned valid ID, you can just upload it and enter some details and you're good to go.
Nowadays, most crypto-exchanges are already asking for KYC from their clients, except DEXs.
If you ever decide to submit your KYC, better do it in a reputable platform like binance.
This is a must now for most CEXs, so if you happen to use their services, you can't avoid such requirement.
Most top alts can be traded in CEXs not in DEXs, so it depends on your trading needs here what type of exchange you need.