Is there an English word that describes mentioning something just for the sake of mentioning it but it's completely impractical?

let's say I say, "we should probably take a more holistic approach, I think it'll give us a lot of new ideas."

A statement that describes an excellent proposition but is flawed only on the grounds of practicality is often known as “a counsel of perfection”.

A counsel of perfection is an ironic adaptation of a mediaeval theological idea of some aspects Christ’s specific advice (that would lead to greater moral perfection) but which would be exceptionally difficult/impractical, if not impossible, for an ordinary person to do. (The main three were obligations of voluntary poverty, chastity, and obedience to a religious superior.)

Currently, the phrase has no religious overtones.

OED:

Counsel (n.) 2. a. Opinion as to what ought to be done given as the result of consultation; aid or instruction for directing the judgement; advice, direction.

counsel of perfection 2b

1909 A. Bennett Lit. Taste 87 Every Englishman who is interested in any branch of his native literature, and who respects himself, ought to own a comprehensive and inclusive library of English literature, in comely and adequate editions. You may suppose that this counsel is a counsel of perfection. It is not.

1938 W. S. Maugham Summing Up xlviii. 186 Every production of an artist should be the expression of an adventure of his soul. This is a counsel of perfection.

As an example, I remember my German teacher saying, “You should learn all the vocabulary and all the grammar, and then you will have no difficulty in the exam.” :)