Season tickets aren't a massive saving for any fan at this level. If you miss a couple of games, that's you essentially "lost out" fans who buy season tickets tend to do so through loyalty rather than for financial gain. It's the same reason very few people have taken refunds from their club for last season when most could have have easily seen that money go to better use.
The last time I bought a season ticket, it ended up costing me around £30 per game based on the games that I actually went to. It didn't really bother me that much as the money was for the club but after that season I knew until the kids were a bit older I would be best sticking to just paying at the gate.