The BP watch in house due to the lack of skill or facility but I was more so trying to illustrate that if say they were to have somehow gotten that watch into their line, that their lack of product image would make it harder to sell the watch to all but the folks in the vast minority like you who buy more so based on the watch than the marketing.
I think that the marketing image as well as the product itself plays an important part in my purchase decision. I, for example, have owned Seikos in the past (the cheap ones before the marketing of Spring Drives), when I was very young when I could not afford a nice Swiss watch, and because of the image in my mind that they were cheap, I have no interest in buying a Grand Seiko even though they are technically great watches.
I also think that good marketing also preserves the brand for longer and thus allows us to continue having access to enjoying these beloved watches (and perhaps even prevent the discontinuation of a model line like the Leman), so while it is great to buy solely on the merit of the watch, I don’t believe that’s enough to keep the brand flourishing.