I tend to agree with you. Entries are the most important for me, both in my systematized strategy book as well as for discretionary trading. Just to give one example, when I start to build a position, entries, as you pointed out, do not only tell me whether I am aligned with current momentum but it also affords me the opportunity, when being right, to reset my stop loss to entry levels (and to later adjust to capture profits). Nothing is more satisfying for my bank roll than to see a trade working in my favor and knowing that the trade turns into a virtually zero risk trade. It gives me a lot of rope in terms of letting the position run. From my experience it keeps me in trades way longer which empirically benefits my p&l.
I tend to agree as well. Some say the entry is least important but I don't see how this could be. If your entry is good, you're not taking much heat, and if you are, then this tells you right away the trade isn't working so you can get out.