Some where . . . some where not, to be honest the interesting entries were the ones in the FMCC/WC series where you were told a Galaxy Commander or Star Colonel sucked for strategy or as administrators. Most the time they did not know they did, but a few were aware and found lower ranked warriors with the skills to offset their own lack. But its an old topic, the Clan system promotes those with tactical abilities . . . and it was all they really had to select for in the closed environment of the Home Worlds.
Did you ever have a bad player? I GMed as campaign with one...I mean, he only had fluff knowledge of the BTU, and I'd call him "D&D" because he was usually shocked that he didn't one-shot kill his opponents. I ran a Clan Burrock campaign and D&D spent all of his points on combat skills and his Omnimech, a Timberwolf. All the other players had lights and mediums and more balanced characters. When D&D wanted more points to spend, one of the Min/Max players showed him a list of Negative Traits and he took several, including a few that I can't even list here... He was such a bad player on tabletop that I allowed him to be the only player in any campaign to have NatAp: Gunnery.
He easily won the position of Trinary Commander in the Trials of Position, out of eight players, and pretty much took up space in an office while he was "helped" by other players who had him sign for stuff, much of which were requisitions for personal gear, and stuff that eventually wound up sold on the Black Market. Having no skills for admin or bureaucracy, he rubber stamped all requests for omni modifications and heavier machines for the players.
Once his superiors caught wind of the antics that he was solely responsible for (on paper, at least) members of the unit were granted to handle the issue in-house with a Trial of Possession over his command. It was a battle between two optimized Timbies, with the challenger (Mechwarrior Blackadder) in a jumper, loaded with 5 Streak SRM6s...with Special Ability: Jumping Jack. D&D managed to hit once as Blackadder closed, aimed high and all 30 missiles hit...D&D auto ejected and survived...expect a fanfic...
D&D: Had no non-combat related skills other than those automatically assigned; would break down and weep hysterically under stress; was hospitalized more than once after having intimate contact with poisonous plants; had a deadly rival: His evil twin, Trinary Commander Skippy, who, years before, was taken as a bondsman by Clan Smoke Jaguar, who also new how to trigger D&D's hysterical reaction...