Personally, what I'm more worried about isn't more people playing our game... it's how the big wigs decide to orient the game. I'd like to call it the 'Evergreenification' of a brand.
You saw it in Transformers. Between the end of G1 and the 2007 movie, we had a bevy of new characters constantly introduced, experiments like Beast Wars or Beast Machines or the Unicron Trilogy... then, when the first Michael Bay movie was a hit, we entered a dark period where every store was just inundated with Bumblebee toys and nowadays, every year seems to bring about a new model of Optimus Prime, Megatron and Starscream (luckily they scaled down the Hive of Bumblebees but seem to have replaced him with Sideswipe?) toys. They've been adhering to G1 designs religiously. There's no new characters anymore, just a series of rehashing of old ones.
Just a lot of appeal to nostalgia.
Same thing with Pokémon after Generation 5 failed to meet expectations and nostalgic fans threw a TANTRUM at not being able to use the same Pokémon for the billionth times, Generation 6 was full of nostalgia with handing you Gen 1 starters and Santalune Forest being the same damn map as Viridian Forest and then Gen 8 has a champion who uses a damn CHARIZARD as his ace...
And with Power Rangers, Hasbro is milking the heck out of MMPR nostalgia and then skipping straight to the Dino theme with Dino Fury.
And as soon as some piece of promotional material gets posted to social media, the conversation is ALWAYS flooded by people who have not engaged with that media property in the last 25 years and expect it to have just waited for them without changing...
TL: DR I'm not affraid of people playing the game, I'm affraid of WotC stagnating in nostalgia and becoming scared of innovating.