If we always follow the suggestions of others then we can not make profit because everyone has different mind and some of them are spreading information about shitcoins just to attract investors towards it. It is true that in case or etheruem and bitcoin we does not need any research because we can see the reality with our own eyes but new coins are unidentified about which prediction become wrong most of the time.
Now a days there are so many altcoins which are profitable like ADA, solana, matic and Link are profitable coins so instead of moving towards new and risky investment try to choose well used coins that will shine during Bull market and avoid scam and unidentified projects.
I agree with your opinion as there are other solid asset that you can use to invest your money if you are not really willing to submit yourself with newly created projects, with top 10-20 existing coins, you can pick whatever asset to invest though there are still many investors who are willing to take that big risk as if by chance they will be able to earn huge.
Just need to take some time to research before making your investment or before jumping to any project that you think will bring you decent profits.