To be honest, TA is reliable when much of people know the technique ex. EMA 100 and 200 is well know moving average to determine long term trend and the price usually reject at that level for 70% all the time I believe because a lot of people believe in it. or simple TA like basic supply and demand zone or support and resistance zone is has 80% accurate in my opinion
Technical or fundamental analysis is also the same in the end will never be able to provide 100% accuracy to really give a profit, the logic is that if for example it can make traders always end the session with a profit then obviously there must be a lot of successful traders, but the reality is not like that. As you explained above about TA and it is true that TA can only be relied on to find out the situation and market conditions that are happening, and usually I use TA only to determine whether the trend will be strong up or strong down or sideways so that when there is already knowing the situation then that's where I will make open positions, but still for the problem of possible losses can still occur.