Are you familiar with someone with the initials I.S. ? they have posted several queries to the IGP Dublin Facebook page on the same John Tutty, the most recent of which I replied to. I’m not sure if this person has any additional details that significantly help, but might be worth checking out…
I’m the one that mentioned Ringsend as a possibility, as there were a number of Glassworks in the area, as the city was usually off limits for these works.
The difficulty with the search is the early date and lack of certainty re exactly where in Dublin city or county your Tutty family lived, also adding to this is difficulty re religious denomination of these Tuttys, and the Valet/Glassblower switch - as far as I remember John jnr’s first marriage (to Emma Burriss) took place in an established Church in England - so equivalent to Church of Ireland here.
There’s very good coverage of Catholic Records for Dublin city and county on NLI/FindMyPast & Ancestry, with transcripts for those parishes in the city on IrishGenealogy, but there are Catholic parishes in County Dublin that do not have records going back as far as the 1820s.
Church of Ireland records for most of the city parishes are also on IrishGenealogy, but not all of the records have survived and some are badly damaged and only portions are readable - e.g. St. Andrews, only a small number of county Dublin parishes are available online at present.
The Catholic marriage you mentioned is listed as Haddington Road on the NLI films but at the time the parish was called Irishtown, Donnybrook and Sandymount and would have covered Ringsend - so is consistent with someone living near one of the glassworks in Ringsend.. So certainly one to note as a probable match. The 1793 baptism you noted took place in a Church of Ireland parish in the city - not near Rngsend
The problem is that there could be other John Tuttys around the same time in Dublin city or County for which there is no written record available - e.g. baptised in a parish where the records dont go back far enough, not available online, noted on a damaged register page, or were destroyed in the civil war etc..lack of detail in the early records does not help either - e.g. occupation dont usually appear in Catholic baptisms or marriages, Church of Ireland records sometimes include occupation but generally 1830s or 40s, so confirming or ruling out this John Tutty at Haddington road may not be possible.