I'll be honest, I haven't used the webpage(actively) in so long I'm not sure if I'm completely understanding what you're talking about(Tapatalk on mobile doesn't require verification).
If I do understand you correctly, and recall the forum enough, the verification system was made to try to stop the amount of spam posts and the like, from spam accounts(usually bots) or a hijacking of legitimate accounts(viruses and the like). With the inputting of the letters and such, though annoying, is a minor inconvinience when compared to the headache of dealing with no verification, with all the spam that would come to pass as a result.
While I personally understand the distaste for continuous verification, you have to look at the bigger picture. Not a bad suggestion, per-say, but not one that would be done, I wouldn't think.
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