Love is blind, is what we call an idiom in the English language, it doesn't mean physical blindness. It's said 'love is blind' because we tend to see only what we want to see in a loving partner, they have our complete trust, and maybe we tolerate far more than we should in a relationship that has really come to end, but we are to 'blind' to see it.
But the thing is, “Everyone in love can see” to me means, people no longer loves unconditionally, they love because of their selfish interest.
Sorry, but I cannot agree with you. I believe most people who do fall in love and marry have complete trust in their partner, and hope their marriage lasts a lifetime.
True love, unconditional love, can be found by searching for it, take your time in getting to know them really well, before making that very big decision in life to marry.
Good luck in your search.