I don't think that Pop wanted to lose on purpose, but he LOVES early season losses. It's a strategy that he learned from Larry Brown. If you lose early in the season, the team will be humbled. Then at that point, the team is more receptive to learning in practice.
If a team just wins the whole season, they can get lazy and fall in the playoffs. The idea is to start slow and then build up so that you peak in the playoffs. If you'd remember, the Pistons had a pretty significant losing streak at a point last season. That's the type of thing LB and Pop love.
Now this Spurs team is probably too good to go on any extended losing streaks, so Pop decided to use his "soft" speech right away.