Five ways to split
Aligned columns is the default and the right answer for anything a program printed. If the same character positions are blank on every line, those gutters are the column boundaries, which keeps a value like New York in one cell instead of two.
Any whitespace splits on every run of spaces or tabs. Correct for command line output, wrong for any value containing a space, which is most names.
A character splits on whatever you type: a comma, a semicolon, a pipe, a colon. Use this for text that was almost a CSV.
One item per line gives a single column, which is the starting point for a list copied out of a document.
Wrap into columns takes a flat list and folds it into a fixed number of columns. That is what a list copied out of a multi-column page needs, where the items came out one per line but belong in a grid.
Why this is not the CSV converter
A CSV states its own structure. The delimiter is in the file, and quoting says which delimiters are data. Plain text states nothing, so the split is a decision rather than a reading, and the tool that makes it should ask rather than guess quietly.
That is also why the grid is here. Whichever mode you pick will be wrong for some rows, and fixing four cells by hand takes less time than finding a tool that guesses differently.