Nothing is inhibiting you from playing all of Destiny. If you choose not to put the effort in to find a group that's on you. Ideal is an understatement, playing a raid with auto joined randoms would be the worst ingame experience ever. The Division came out a week ago lol, I'd hope its player base would be higher. Keep in mind it hasn't hit anywhere near Destiny at its peak and I doubt it ever will. Casuals don't stick to one game very long, which is what the division is at the moment, even more so than Destiny.