How to remove lines from TSV file where columns are empty or all whitespace?

I've a tab-delimited file, e.g. myfile.tsv:

abc\tfoo
xyz\tbar

but sometimes, it has some blank columns, e.g.

abc\tfoo
xyz\tbar
what\t
\tthe
bleep\tsleep

i.e.

$ printf "abc\tfoo\n" > myfile.tsv
printf "xyz\tbar\n" >> myfile.tsv
printf "what\t\n" >> myfile.tsv
printf "\tthe\n" >> myfile.tsv
printf "bleep\tsleep\n" >> myfile.tsv

$ cat myfile.tsv 
abc foo
xyz bar
what    
    the
bleep   sleep

I could write a python script to remove the lines where the columns are empty, e.g.

with open('myfile.tsv') as fin:
    for line in fin:
        x, y = line.strip().split('\t')
        x = x.strip()
        y = y.strip()
        if x and y:
            print(line)
            

But how do I do the same with some unix shell commands, e.g. grep, sed, awk or something.

I've tried also something like this in grep:

grep -e ".\t." myfile.tsv 

That seems to work but if the columns have spaces, it won't.

$ printf "abc\tfoo\n" > myfile.tsv
printf "xyz\tbar\n" >> myfile.tsv
printf "what\t  \n" >> myfile.tsv
printf "  \tthe\n" >> myfile.tsv
printf "bleep\tsleep\n" >> myfile.tsv

$ grep -e ".\t." myfile.tsv       
abc foo
xyz bar
what      
    the
bleep   sleep