This isn't anything negative towards the teams with semis, but if the Superstock teams working out of big trucks were to go Superbike and let the little guys fight out Superstock, both classes might benefit. Same in 600s. The European/WSBK paddock is fashioned much more like that.
Pretty sure that's the long term goal once things pick up to where those teams can afford to do it. Granted there will almost always be someone overfunded wanting to run the smaller/cheaper/easier class(es). No real way to avoid it without legislating it in the rulebook somehow.