Cryptocurrency and specifically bitcoin has a clear definition, using an immutable blockchain, fully decentralized, censorship resistant, etc. Copycat-coins such as BSV that are abusing the name "bitcoin" have none of these characteristics ergo they are categorized as shitcoins.
AFAIK,anyone can become a miner in bsv. also keep in mind that bitcoin hash power is conenctrated in the hands of just a few large miners from what i've heard.I don't know how what exactly you heard (and how you remember it), but it probably refer to hashrate distribution between multiple pools. But according to Blockchair, hashrate distribution on Bitcoin (https://blockchair.com/bitcoin/charts/hashrate-distribution) is more healthy compared with BSV (https://blockchair.com/bitcoin-sv/charts/hashrate-distribution).
i know bsv is not on the level of btc in terms of peoples' trust here but still. i think it's better than some shitcoins out there. like shiba inu maybe?? you cant seriously tell me that bsv is not a more serious project than something like shiba inu...but i guess you will. 
SHIB isn't even coin/cryptocurrency, but only token.
It is only a problem for actual P2P sharing protocols such as Bittorrent (which I hope makes it clear that such technology's ports will be blocked by ISPs, and you getting sent eviction notices from your ISP)
Most people don't need to worry about it though since it only happens on some developed country.