C'mon - "millions of people"?? Beyond that, you missed my point - which related to making things clearer for the TT user. See the last sentence in my follow-up post. ("I don't know if that matters to the IRS, but it would certainly be clearer for the taxpayer.")
The instructions that you refer to do not apply to the situation I've described. The language that you quoted is indeed in the Instructions for Form 8949, but they apply to a situation in which the taxpayer includes an attachment. When a taxpayer uses TT in the way that I've described (e-filing, followed by mailing the detailed Form 8949), there IS no attachment accompanying the e-filed summary version of the form. (And yes, I am familiar with Form 8453.)
