I've always tried to understand the thinking behind removing landing fees for weather diversions. In all honesty I think it was a solution to a problem that was deeper rooted.
If you're a VFR flyer you fly in VMC. You plan to stay in VMC, you plan options in case it looks marginal but legal. If you doubt you can finish the flight in VMC, or, if your planning (excuse the use of what is a swear word to some please) suggests you won't be able to achieve it, then you don't go. It's a simple decision - you're not doing it for anything other than pleasure (supposedly) after all.
If you're an IFR/IMC flier then you should, by definition, be staying current. If you can afford to stay current you can afford to divert. If your consideration to divert is based on financial concerns then quit flying and take up bridge or something else similar.
Learn to plan properly or bite the bullet - why should you be entitled to a freebie if you've screwed up.