However, what makes a lot of sense (and I've seen a lot of bitcoin Maximalists do) is to recommend keeping a bitcoin portfolio alongside an altcoin one but Bitcoin has to be the #1 asset and have the most weight.
This is a simple and highly effective strategy, with this strategy we will be safe because the majority of assets are bitcoins and we also have the opportunity to get bigger profits from small investments in altcoins.
Holding 100% bitcoin is not necessarily a bad idea but it is not perfect either because we will miss out on many great profit opportunities from altcoins. Many people are too conservative and stubborn when they don't want to invest in altcoins but they also try to prevent others from investing in altcoins. That not only makes them but also makes others lose out on greater opportunities. They forget that we are here to make profit, not to prove right or wrong.
Thank you for the compliment and I agree with your reply too. Holding all portfolio in Bitcoin alone is not necessarily a bad idea but there are more opportunities.
If the goal is to profit oriented, one can even profit off altcoins and funnel the profits to increasing their Bitcoin holdings. That's another beautiful strategy.
Like you said, some people just want to be right so much that they're willing to discourage others. For me, I don't want to be right but I want to make as much money as I can and increase my bitcoin stash. That has always been the goal.