I’m not sure that I understand the question. There is nothing wrong with a chapel designated for prayer, devotion and adoration of the Blessed Sacrament. More important…what do you think is happening at mass…a Eucharistic celebration? Christ is always present in the people gathered,in the priest presider, in the reading of the Word of God and especially in the consecrated bread and wine that we share. It’s the same Christ that is present in the tabernacle.
I would respectfully disagree with the implication, that the two are identical activities of worship, Exposition and Adoration is an extension of the Eucharistic Sacrifice of the Mass, but it is not the primary reason for the existence of the Most Holy Sacrament of the Altar: that reason is properly the making present to our eyes the One Sacrifice of Calvary, and the act of our taking into ourselves the divine life of Christ Jesus Himself by eating His Body and drinking His Blood.
The reason why a consecrated Host that is permanently exposed for Adoration is covered by a cloth when Mass is said on the same Altar upon which It is exposed, is so that the worshipers’s attention will be drawn not to the already consecrated Host, but to the eucharistic action in which s/he is participating.
For comparison, from the 28th of the Thirty-Nine Articles of Religion (of the Church of England) we find this:
The Sacrament of the Lord’s Supper was not by Christ’s ordinance reserved, carried about, lifted up, or worshipped [sic].
(1)
Which could be seen (and is so seen by Evangelicals and Dissenters (but hey that’s why they’re Dissenters

)) as an absolute prohibition of Exposition and Benediction. The key words here though are “was not by Christ’s ordinance” i.e. Christ did not command it, but not commanding something to be done is not the same as positively forbidding it (I believe this was also Newman’s argument in his Tract 90), which means the primary focus of the Eucharistic Sacrifice is not the worship of the Host, but the application of its benefits and merits to those worshipers present, but which does not completely rule out the worship of the Same,.
The Article cited here is an example of extreme Protestant reaction (trying to throw the baby out with the bath water) to perceived extremes of Catholic piety: the perception (rightly or wrongly) that laity and religious ignored the communal nature of the Mass as the Lord’s Supper, in favor of a merely passive gazing upon the Sacrament, not daring to receive the Same (I don’t have citeable sources, but i believe there were parts of Europe where Christians refrained from receiving the Sacrament until their death-bed, or slightly less extremely, only once (or twice) though I’m open to correction on this point.
“Blessed, Praised, Worshiped, and Adored by Jesus Christ in His Throne of Glory and in the Most Holy Sacrament of the Altar”
(1) From the 1571 text, retrieved from
eskimo.com/~lhowell/bcp1662/articles/articles.html#28