If it were only about the rules, you are correct. If it’s about the politics, you might be correct on a long enough time scale, but it’s irrelevant in the short to medium term. Right now we’re in a holding pattern on the cloture rules because of promises of tick for tack escalation between both parties. It’s not as if one party is going to loosen them for themselves for one session of Congress and be able to reasonably expect that they will be tightened up to their benefit by their opponents once they’re a minority in the next session.
Cloture rules have both tightened and loosened over the history of the Senate, so this is demonstrably false.