Because not everyone can read a chart or doesn't know TA. They thought it is always the good time to buy well some cases it is but TA is very important coz it helps you to identify and analyze statistical trading trend.
True! In general, they don't know the proper knowledge, skills, techniques, and experiences to invest in this market. There is always a golden rule that is "buy low sell high". Buying when the price is going up is also a common phenomenon of FOMO (Fear of missing out). That's the result of letting emotions affect decisions, and it's extremely harmful.
They are chasing the pump which is why when they see a coin's price is going up, they tend to buy as well to find out if they can profit while the price goes us and of course they also sell when the price goes down. If they just learn how to read charts, none of us will pump the coins.
Isn't everyone also got into this stage where we buy while the price is increasing up?