It is harsh, but I think it is within the remit of what a pubishment could be for that offence.
The guy clearly seems a nice bloke, out of character and regrets his actions. He is unlikely to reoffend.
He may have been made an example off, but have not been dealt with unfairly.
My advice is to take the hit, most games are able to be viewed on SKY anyway. I’m not sure if anything can be done after the period when you can ask for it to be reconsidered. If so, that would certainly be worth considering.
I would not advise sneaking in, if so all the above of being out of character, spare of the moment etc. becomes BS as you show that you don’t respect the rules and pre-mediated decide to break them.
At which point any further punishment would be deserved.
It’s harsh and you have had bad timing and people have certainly done worse and received a lot less. However it is not unfair and you just have to accept it.
My 2p and certainly don’t mean any offence on it. Hopefully you find something to replace the void, it’s fun going to the games but shouldn’t be a substitute for other areas of your life.