question #3 Sahih al-Bukhari 346, Book 7, Hadith 13 : What concerns might arise from allowing Tayammum when water is available but inconvenient to use?

I was with `Abdullah and Abu Musa; the latter asked the former, “O Abu `Abdur-Rahman! What is
your opinion if somebody becomes Junub and no water is available?” `Abdullah replied, “Do not pray
till water is found.” Abu Musa said, “What do you say about the statement of `Ammar (who was
ordered by the Prophet (ﷺ) to perform Tayammum). The Prophet (ﷺ) said to him: “Perform Tayammum and
that would be sufficient.” `Abdullah replied, “Don’t you see that `Umar was not satisfied by `Ammar’s
statement?” Abu- Musa said, “All right, leave `Ammar’s statement, but what will you say about this
verse (of Tayammum)?” `Abdullah kept quiet and then said, “If we allowed it, then they would
probably perform Tayammum even if water was available, if one of them found it (water) cold.” The
narrator added, “I said to Shaqiq, “Then did `Abdullah dislike to perform Tayammum because of
this?” He replied, “Yes.”