Based on what information?
SARS-CoV-2 was thought to be only transmitted by symptomatic patients (this is true for many, but not all, viral infections)
The extent of asymptomatic COVID-19 infections was unknown (it wasn't known until serology studies started emerging in May)
The effectiveness of masking was mixed with some evidence of negative effects (as discussed)
So what evidence suggested universal masking at that point, taking in account how the virus was thought to be transmitted and who was at risk for infection?
That's really Monday Morning Quarterbacking it. The risk of masking making things worse was of serious concern back then, as I've already cited the important studies that suggested that outcome. Let's not forget the potential of "I'm wearing a mask, therefore it is safe and I can do stupid things again." Thankfully masking did offer protection for COVIDiots, but imagine what if it didn't?
Misleading in what way? The key stakeholders in this discussion all spoke to 1) shortage of masks 2) risks of wearing masks 3) how the virus was presumed to be transmitted. What exactly was misleading about those statements that was made at that time with the science that was known at that time?
And no, the CDC doesn't always err on additional precautions without evidence. Take RSV for example, a common respiratory virus. One of the scourges of pediatric hospitals and one of the most common reasons why children are admitted to the hospital each year.
No masks are recommended.
I'm not going to touch the influence of the previous administration over some of the statements regarding recommendations, but we both know they influenced important aspects of how the pandemic progressed. I'm sure you and I see eye to eye on the negative influence they had.