For the majority of men, a relationship is not a waste of time. The majority of men need to get into some sort of relationship to get sex on a regular basis. Very few men are able to get regular sex without the relationship. Life is better with regular sex.
I had regular sex without being in a relationship for a long time.
But I get your point.
It can be challenging to remember that SoSuave forum participants are not a representative sample of men as a whole. The typical man with a blue pilled ideology towards relationships and who is a beta male never discovers this forum.
If the typical beta male isn't in a relationship, he's often swiping profusely on one or more of the apps trying to get dates. He might be going to bars and doing approaches though that behavior has diminished in the last 10-15 years. He's likely not doing any non-bar approaching of strangers (daygame). While he's swiping his life away, he's also an OnlyFans simp and/or compulsive porno tube website masturbator.
If a beta male manages to get into a longer term non-marital LTR, he's getting more sex though he likely had to lower his standards far enough in his swiping to get something. He's a pussie beggar. He might have even had to settle for a single mom if he's a 30s/40s guy with a woman close to his own age. Beta males who are in LTRs with childless women are often thinking about when they have to put a ring on it to keep the sex going.
If a beta male gets married, the relationship often decays into a lower sex relationship, especially after 1-2 children. The beta might start watching OnlyFans and porn more.
Most betas will need a relationship to get whatever sex that they can find. Most men are pussie beggars who settle for whatever mediocre to subpar pussie close to their own age that they can get, often from profuse app swiping.