Normal readers know that capital "i" has crossbars on it.

Why design an intentionally ambiguous font? There is only downside to it.

You lost this fight more than a century ago. Helvetica and almost all related grotesque fonts lack a serif on "I", and dominate modern typography. You see them everywhere, on every device. Pull your phone out your pocket and see if you can see "crossbars" on the I. They're not there, and never have been.

And people like it this way! So that's why we design fonts like this.