Right in sim racing game's view. Remember the hype before the game was launched? There is high hope for this game to match with Forza and Gran Turismo. But this game is no bigger than Need for Speed. I think Driveclub is made for kids.
You mean the series that on PS4 has more players than GTS has? That would be Need for Speed......
....of which DC has more players than any single NfS title on PS4 and more than GTS.
Its an odd argument to try and use given that both NfS and DC are 'bigger' games than GTS in that regard.
As for sim racing titles, DC never made such a claim at all, not once, and a strong argument can be made for GTS and Forza only just making the cut in that regard.
Your closing mark also goes to show just how absurd your remark is, given the numbers it seems quite a few more players than just kids have picked it up. Then again I do have to take account that you seem to be a GTS fan attempting to play the Sim-Purist card, which is utterly hilarious (particularly given that an arcade title managed to simulate FWD torque steer and FWD lift off oversteer better than your chosen sim does).
I get it, you love GTS and don't seem happy that others might like other titles as well, or that an arcade title has more players than GTS has. However to attempt to use that as a sly dig at anyone who does like DC (made for kids) really does you no favours.
Lots of love, a 48 year old 'kid' with a deep love of everything from arcade racers right through to sims.