Looking up Haute Elan, who are the company running 'modest' fashion week, they are explicitly targeting the Muslim market and describe it elsewhere as 'Muslimah Fashion'. IMO that would be a much better name, Muslimah Fashion Week. Much less loaded.
'Modest' does imply that other fashion is immodest. And the opposite of that is immodest. And the definition of immodest and some of it's synonyms:
lacking humility or decorousness.
"his immodest personality"
synonyms: indecorous, improper, indecent, indelicate, indiscreet, immoral; forward, bold, brazen, impudent, unblushing, unchaste, unvirtuous, shameless, loose, wanton; informalfresh, cheeky, naughty, saucy
"her clothes and manner were most immodest"
Which of course gets us into the full implications of 'modest' and 'immodest' dress which implies that women who dress 'immodestly' are signalling immorality and unchasteness which then gets us into old fashioned arguments about women being dressed a certain way 'asking for it'. Which funnily enough do tend to be rather prevalent in the countries where this is the predominant mode of dress.
Joan you are being massively hypocritical objecting to supposed implications posters are making on this thread while at the same refusing to accept that 'modest' dress makes all sorts of implications about the 'immodest' dress of others.
It's a matter of mutual respect. Women are free to dress in either fashion and people are free to exhibit or sell either. There is only a problem when people start implying either preference has any kind of superiority over the other. And the 'modest' description certainly does that.