Automatic grouting tool - GIF

[Frank S]

Might be cumbersome to use but that is the nature of many tools which are made in an effort to speed up an otherwise mundane and laborious task.
Over they years I have had the privilege to know several brick layers, stone masons and faux stone cladding installers.
Brick layers will almost always have an apprentice doing the point troweling and clean up brushing of their mortar joints.
Likewise for stone masons. I've known some contractors who had several ticks of their trade like using a sock like tool much as a confectioner might use to decorate cakes to inject the mortar into the joints to fill them. Another might have something which would resemble a calk gun plus other tools of their trades. Many will try virtually anything they can come up with to make their very tedious jobs easier save them some labor cost in application and clean up.
Faux stone cladding installers do the same thing This goes for guys who install ceramic tile mosaics. Can you imagine the the amount of labor Antoni Gaudi put into creating La Sagrada Familia in Barcelona Spain. Or the tiling of the subways and tunnels in New York
Gimmicky and forearm killers maybe. Whose to say unless we've actually had to walk their shoes. Not me, I tried helping a brick layer friend of mine once, make that twice. First and last all in the same day. I was 20 years his junior and thought at the time I was invincible, I only thought that I was used to hard work at a fast pace I wouldn't want to even imagine stone work.