Where I live during the Rugby and Soccer seasons it's not uncommon for the 'normal' pitches to be unplayable due to consistent periods of rain.

A number of schools, and public facilities, near me have switched to plastic pitches for this reason. I'm not advocating for them but there is a rationale.

BTW it's not just that being very muddy makes it difficult to play on but that using the pitch in that state trashes the grass.

Cost. Maintaining dirt and landscapes in this economy?