You seem to have forgotten much yourself.
Firstly "the US" didn't make the Doctor Who TV movie and they certainly didn't make it "for the Millenium". I wasn't aware the US made films other than government propaganda, but the TV movie was a joint production between the BBC, BBC Worldwide, Fox and Universal. So not a solely american production then. It was made in 1996, so hardly "for the Millenium".
And the film certainly didn't inspire the BBC to give us Tennant as the new doctor for several reasons. Firstly the TV movie was always intended as something to test the water for the return of the series, perhaps as a joint BBC/Fox production. Since it was so poorly received in the US Fox never followed up on the option. Although the first showing had good viewing figures fans generally did not receive it well and the BBC also decided not to make a new TV series. Secondly you may have noticed it was nine whole years until the TV series resurfaced, IOW there was a longer gap between the TV movie and the start of the reboot than between the airing of the last McCoy episode and the TV movie. If the TV movie had really inspired the reboot of Who it would have come along a lot sooner than 2005. Finally, and the biggest error in you recollection, the BBC did not restart Who with Tennant in the lead role, it was Chris Ecclestone.
Oh and WTF has Hamish Macbeth got to do with anything? AFAIR Tennant never appeared in that particular bit of sunday teatime televisual fluff. If he did it must have been a very small part.
And as for the seventies movie spinoffs, IIRC they argue against you pretty convincingly. They were almost all shadows of the TV series, few of them were commercially successful and, lets be honest, they were generally crap.
You seem to approach this from the viewpoint that this should happen unless people can argue strongly enough against it. I approach it from a more simple viewpoint, which is to ask the question "Why?". Doctor Who is a TV series and a succesful one at that, why is there a need for a film (Hollywood or otherwise)? Nobody has yet come up with a convincing answer to that question. Certainly to say that it's what used to happen in the seventies is not a convincing argument. As parents like to say to their kids; If everybody else jumped off a cliff would you do it too?