Now this is a bit daft, but each to their own. The majority of 'gamers' are in their 30s or 40s, (people age between 29 and 39 make up the biggest group,) and around 50% are women. So I never understand this 'see me when you've grown up and are not a child any longer' attitude towards people who do gaming.
I get that maybe some women don't want a man who does gaming, and they are entitled to their opinion. I mean, I couldn't be with a man who is obsessed with golf, or cycling, or football, because most of the men who are (who I have known) are selfish, and self-centred, very rarely at home, they spend loads of family money, and they rarely engage in family life. But hey, JMO right...?
But saying people who do gaming are immature/childish is ridiculous. I know several people (personally) who have a gaming channel on YouTube, and they make around £75K to £100K a year, just from their gaming channel. (They have a subscriber count in the 6 figures.) Some are doing it as a full time job now, and are out-earning some of their friends and peers by a country mile.. Doesn't sound very 'childish' or 'immature' to me. 