@Energeticenoch . Not sure how it is patronising, to respond to another poster suggesting supporting your dc somehow ruins other 'plans'.
IMO - and of course anyone is free to disagree - part of being a parent is supporting them at things they take part in. I'm sure most of us have wished we were somewhere else other than standing on a freezing touchline (for some) / listening to 2 hours worth of boring classical music (for others) / watching a tedious and lengthy dance show which we have had to pay a fortune to get in to the theatre to see our little darling or their 3 min appearance (for others) / insert torture of your own choice (one of mine played chess competitively for a while !!) but it is all part of the parenting journey, for most of us, surely ?
For those lucky enough to have Grandparents still alive to visit, then there are generally all the other hours of the weekend I would have thought ? Or for many, their Grandparents will even come along and watch whatever activity their Grandchild might be involved in, sometimes.
Like illiterato , at different stages you do different things when you have more than 1 dc. All my dc know that I would support them when I can, and make arrangements to get them to where they need to be when I couldn't. What I said in my post, if you need it breaking down, is I never looked at supporting my dc as "ruining my plans" because, as we made plans, it included things that were important to them. As @Simonjt says "Watching my son play rugby, improve, achieve and have a good time doesn’t ruin my weekend" - Feel free to substitute dd, and substitute any other sport, or indeed, 'instrument' for rugby.
@LemonsAndCherries and that's fine - they are clearly getting lots of extra curricular activities. For others families, they might choose to do their extra curricular stuff at a weekend, and have tea / spend the evening with Grandparents every Tuesday when maybe yours are at Brownies or doing drama or whatever. The other families would enjoy going to watch their nieces / nephews / Grandchildren do something they enjoy at the weekend. Lots of Grandparents do that.
@saraclara - I agree with you all the way. I have had to say 'no' more than once to activities that were not possible to fit in to family life. But that doesn't mean it "ruins weekends" to support your child playing a match on a Sunday morning.