How to treat the sentence "whoever is serious first in love will lose"?

I just don't agree with this sentence. People who think like this are ashamed to death. Love is love. It doesn't matter if you win or lose, and you won't lose face if you love more. If I like someone, I will devote myself wholeheartedly. I think if you like someone, you should say it out loud and let others know. It's not a shame for me.

Those who feel that they love first and then lose are actually psychologically fragile and it is difficult to convey their sincerity. Some people who think this way are hypocritical and feel that they must be overbearing and cannot be in a weak position in love.

However, I want to say that loving a person and being with him is not more than winning or losing, but just because of love, I like being together and want to take better care of each other. If you love, be serious, show your sincerity and treat it well. If you always care about winning or losing, you will be very tired in this relationship, or you are the real loser in this relationship.